<HallDiv>:
    BoxLayout:
        Button:
            id:com_scroll
            text:"com"
            size:(200,50)
            size_hint:(None,None)
            on_release: root.openComHandle(self)

        Button:
            id:baud_scroll
            text:"baud"
            size:(200,50)
            size_hint:(None,None)
            on_release: root.openBaudHandle(self)

        Button:
            id:serial_switch
            text:"open"
            size:(200,50)
            size_hint:(None,None)
            on_release: root.openSerialHandle(self)

        Button:
            id:led_button
            text:"?"
            size:(200,50)
            size_hint:(None,None)
            on_release: root.ledButtonHandle(self)

#波特率列表
<BaudListDiv>
    Button:
        text:"9600"
        size:(200,50)
        size_hint:(None,None)
        on_release: root.select("9600")
    Button:
        text:"115200"
        size:(200,50)
        size_hint:(None,None)
        on_release: root.select("115200")
